Valterra' s A10-1320VP Bug Screen for RV Water Heater Vents are designed to fit Atwood 6 and 10 gallon water heater vents and Suburban 6 gallon water heater vents. They are easy to install and offer minimal airflow restriction while ensuring that your vents stay free from costly invasion by unwanted pests (nesting insects, birds, and rodents). Screens should be inspected monthly and cleaned when necessary to maintain proper air flow. Screen measures 5. 9" x 8. 5" x 1. 3".